Malicious PDF — malware analysis report

Static analysis result for SHA-256 d326280f3c5d0d40…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 06:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d96ed06066d3b7b7e14eface9a410eb SHA-1: c6ae198c3c995dcb0a192401d7e063f049e02221 SHA-256: d326280f3c5d0d40c0113b2ba582a08dff281dc227ba2d99958070dc1f432c6f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Blue Jays 2020 schedule pdf' and the malicious URL. This suggests a phishing attempt to redirect users to malicious infrastructure under the guise of providing a schedule.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=blue+jays+2020+schedule+pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8fa0036ef7465ea804f506bcd2eca4.pdf
    • https://static.usrfiles.com/ugd/20d83a_f6f7b2d73a7448969ac97041392c982a.pdf
    • https://static.usrfiles.com/ugd/b77b08_e70adae2d7094fe0b08ab1d092086536.pdf
    • https://static.usrfiles.com/ugd/5b604d_6a8b040866c34e8893e5c1747bfac93c.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/protect_adobe_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/bupivofapide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/jusawuwagowazevoxekib.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/synonyms_worksheet_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/72898629807.pdf
    • https://static.usrfiles.com/ugd/dd4472_ecf299100eb24bcd8d5aff2f177f83fa.pdf
    • https://static.usrfiles.com/ugd/69695d_99a0517aabc84d8eb565bc874e9f9b08.pdf
    • https://static.usrfiles.com/ugd/79cb75_ba3bbee590684c339abd1ba02b82d540.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f31962ec1ad4c449e17e7687c582818.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3475/files/rukofewuvesiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/save_base64_to_file_php.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/50033069476.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/fevetow.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ded.bin
d074c794c35333fe7ebb2ea566855127fad944380335213b12a1faf0d6b27e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DED 5648 bytes
font_01_sfnt_off0000712f.bin
1d9bbe70c23f65302ee66b146cdf9af31dbfeaa34739e53d27be30828055280f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 14060 bytes

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